Power ISA™ Version 2.03 - Power.org

Version 2.03
Vector Subtract Unsigned, Modulo,
Integer to Accumulator Word EVX-form
evsubfumiaaw RT,RA
4 RT RA /// 1226
0 6 11 16 21 31
RT 0:31 (ACC) 0:31 - (RA) 0:31
RT 32:63 (ACC) 32:63 - (RA) 32:63
ACC 0:63 (RT) 0:63
Each unsigned-integer word element in RA is subtracted
from the corresponding element in the accumulator
and the results are placed in RT and into the
accumulator.
Special Registers Altered:
ACC
Vector Subtract Unsigned, Saturate,
Integer to Accumulator Word EVX-form
Vector Subtract from Word
evsubfw
RT,RA,RB
4 RT RA RB 516
EVX-form
0 6 11 16 21 31
RT 0:31 (RB) 0:31 - (RA) 0:31
RT 32:63 (RB) 32:63 - (RA) 32:63
Each signed-integer element of RA is subtracted from
the corresponding element of RB and the results are
placed in RT.
Special Registers Altered:
None
Vector Subtract Immediate from Word
EVX-form
evsubfusiaaw RT,RA
evsubifw
RT,UI,RB
4 RT RA /// 1218
0 6 11 16 21 31
temp 0:63 EXTZ((ACC) 0:31 ) - EXTZ((RA) 0:31 )
ovh temp 31
RT 0:31 SATURATE(ovh, temp 31 , 0x0000_0000,
0x0000_0000, temp 32:63 )
temp 0:63 EXTS((ACC) 32:63 ) - EXTS((RA) 32:63 )
ovl temp 31
RT 32:63 SATURATE(ovl, temp 31 , 0x0000_0000,
0x0000_0000, temp 32:63 )
ACC 0:63 (RT) 0:63
SPEFSCR OVH ovh
SPEFSCR OV ovl
SPEFSCR SOVH SPEFSCR SOVH | ovh
SPEFSCR SOV SPEFSCR SOV | ovl
Each unsigned-integer word element in RA is
zero-extended and subtracted from the corresponding
zero-extended element in the accumulator saturating if
overflow occurs, and the results are placed in RT and
the accumulator.
Special Registers Altered:
ACC, OV, OVH, SOV, SOVH
RT 0:31 (RB) 0:31 - EXTZ(UI)
RT 32:63 (RB) 32:63 - EXTZ(UI)
UI is zero-extended and subtracted from both the high
and low elements of RB. Note that the same value is
subtracted from both elements of the register.
Special Registers Altered:
None
Vector XOR
evxor
4 RT UI RB 518
0 6 11 16 21 31
RT,RA,RB
4 RT RA RB 534
EVX-form
0 6 11 16 21 31
RT 0:31 (RA) 0:31 ⊕ (RB) 0:31
RT 32:63 (RA) 32:63 ⊕ (RB) 32:63
Each element of RA and RB is exclusive-ORed. The
results are placed in RT.
Special Registers Altered:
None
Chapter 6. Signal Processing Engine (SPE)
247